﻿#region license
// Copyright (c) 2007-2009 Mauricio Scheffer
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//      http://www.apache.org/licenses/LICENSE-2.0
//  
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System.IO;
using NVelocity;
using NVelocity.App;

namespace StringInterpolation {
    public static class StringExtensions {
        private static readonly VelocityEngine engine;

        static StringExtensions() {
            engine = new VelocityEngine();
            engine.Init();
        }

        public static string Fill(this string s, object param) {
            var context = new VelocityContext();
            foreach (var prop in param.GetType().GetProperties())
                context.Put(prop.Name, prop.GetValue(param, null));
            using (var tw = new StringWriter()) {
                engine.Evaluate(context, tw, "", s);
                return tw.ToString();
            }
        }
    }
}